Electrical devices(儀器) could soon use power made by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking. British scientist Max Donelan and other scientists in Canada and the United States developed the device.

The device connects to a person’s knee. As the person walks, the device captures energy each time the person slows down. To do this, the device helps with the slowing down movement of the leg. The movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.

There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also be used in hospitals to operate heart pacemakers(起搏器). It could even be used to assist in the movement of robotic arms and legs.

The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy. But the researchers hope to make a lighter, less costly version. An improved version shou1d be ready in one year.

The developers hope the device will one day help developing countries. Near1y twenty five percent of people around the world live without electric power.

A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania. He created a bag carried on a person’s back that also produces power from wa1king.

The knee device does not produce as much electricity as the bag. But the bag requires the walker to carry a load of twenty to thirty kilograms.

1.The second paragraph mainly talks about .

A. who developed the device

B. how the device works

C. several possible uses for the devices

D. how much electricity the device can produce

2.Compared with the device designed by Larry Rome, this new device .

A. produces power without adding more loads to the walker

B. can produce more power in a much shorter time

C. needs to be equipped with a battery

D. can help the walker wa1k faster

3.From the passage, we can learn that the electrical device can .

A. help housewives operate the washing machine

B. make it much easier for us to go online

C. produce more electricity than that invented by Larry Rome

D. be applied in medicine to operate heart pacemakers

4.What would be the best title for the passage?

A. First device powered by walking wi1l soon be on the market

B. Advanced technology brings in a new way to operate heart pacemakers

C. Device gives new meaning to the idea of power walking

D. Human energy will become a main source of electricity

1.B

2.A

3.D

4.C

【解析】

試題分析：文章主要介紹了一種新的發(fā)電裝置。科學(xué)家研制出了一種通過捕捉人們行走的動作來發(fā)電的裝置。這種裝置被綁在人們的膝蓋上，在行走的過程中，每當人們的腳步放緩時，裝置就會捕捉人體釋放的能量。

1.1】段落大意題。根據(jù)第二段“The device connects to a person’s knee. As the person walks, the device captures energy each time the person slows down.”可知，第二段主要講的是這種裝置是如何工作的，故選B。

2.2】細節(jié)理解題。根據(jù)倒數(shù)第二段“He created a bag carried on a person’s back”和最后一段“But the bag requires the walker to carry a load of twenty to thirty kilograms”可知，Larry Rome設(shè)計的裝置需要在背上放二十到三十千克的袋子，而新的儀器則不需要使用者負重行走，故選A。

3.3】推理判斷題。A項未提及；根據(jù)第三段“it could help people who work in areas without electricity to operate small computers”可知，發(fā)的電可以為小型電腦提供電能，排除B；根據(jù)最后一段“The knee device does not produce as much electricity as the bag.”排除C；根據(jù)第三段“The device could also be used in hospitals to operate heart pacemakers(起搏器).”可知，這種裝置可以用來運行心臟起搏器，故選D。

4.4】選擇最佳標題。第一個用行走來發(fā)電的裝置是Larry Rome在2005年發(fā)明的，排除A；根據(jù)第三段“There are several possible uses for the device.”可知，通過行走發(fā)的電用于運行心臟起搏器只是用途之一，B項太片面，排除B；通過人的運動所發(fā)的電是有限的，不可能成為主要的電力來源，排除D，故選C。

考點：科技類短文閱讀

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